package main

import (
	"fmt"
	"os"
	"runtime"
)

var (
	a      = 5
	goroot = os.Getenv("GOROOT")
	user   = os.Getenv("USER")
	home   = os.Getenv("HOME")
)

func main() {
	r1 := "test"
	fmt.Printf("Καλημέρα κόσμε; or こんにちは 世界\n")
	strings := os.Args
	fmt.Println(strings)
	fmt.Println(change())
	fmt.Println(a)
	fmt.Println(goroot)
	fmt.Printf("%q\n", user)
	fmt.Printf("%q", home)
	system := runtime.GOOS
	fmt.Printf("my system is %s\n:", system)
	path := os.Getenv("PATH")
	fmt.Printf("Path is %s\n", path)
	r2 := r1
	fmt.Println(r2)
	r1 = "test2"
	fmt.Println(r2)

}

func change() int {
	a = 6
	return a
}
